1
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Reddy PM, Ramachandran K, Anbarasan P. Palladium-catalyzed diastereoselective synthesis of 2,2,3-trisubstituted dihydrobenzofurans via intramolecular trapping of O-ylides with activated alkenes. J Catal 2021. [DOI: 10.1016/j.jcat.2021.02.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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2
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Ciesielski P, Metz P. Asymmetric one-pot transformation of isoflavones to pterocarpans and its application in phytoalexin synthesis. Nat Commun 2020; 11:3091. [PMID: 32555159 PMCID: PMC7303153 DOI: 10.1038/s41467-020-16933-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Accepted: 05/29/2020] [Indexed: 01/10/2023] Open
Abstract
Phytoalexins have attracted much attention due to their health-promoting effects and their vital role in plant health during the last years. Especially the 6a-hydroxypterocarpans glyceollin I and glyceollin II, which may be isolated from stressed soy plants, possess a broad spectrum of bioactivities such as anticancer activity and beneficial contributions against western diseases by anti-oxidative and anti-cholesterolemic effects. Aiming for a catalytic asymmetric access to these natural products, we establish the asymmetric syntheses of the natural isoflavonoids (−)-variabilin, (−)-homopterocarpin, (−)-medicarpin, (−)-3,9-dihydroxypterocarpan, and (−)-vestitol by means of an asymmetric transfer hydrogenation (ATH) reaction. We successfully adapt this pathway to the first catalytic asymmetric total synthesis of (−)-glyceollin I and (−)-glyceollin II. This eight-step synthesis features an efficient one-pot transformation of a 2′-hydroxyl-substituted isoflavone to a virtually enantiopure pterocarpan by means of an ATH and a regioselective benzylic oxidation under aerobic conditions to afford the susceptible 6a-hydroxypterocarpan skeleton. Concise total syntheses of 6a-hydroxypterocarpans are sought after due to their broad spectrum of bioactivities. Here, the authors report the asymmetric syntheses of several natural isoflavonoids, including (−)-glyceollin I and (−)-glyceollin II, by means of an asymmetric transfer hydrogenation (ATH) reaction.
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Affiliation(s)
- Philipp Ciesielski
- Fakultät Chemie und Lebensmittelchemie, Professur für Organische Chemie I, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany
| | - Peter Metz
- Fakultät Chemie und Lebensmittelchemie, Professur für Organische Chemie I, Technische Universität Dresden, Bergstraße 66, 01069, Dresden, Germany.
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3
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Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Koji Yamada
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido
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4
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Yan W, Yang J, Tang H, Xue L, Chen K, Wang L, Zhao M, Tang M, Peng A, Long C, Chen X, Ye H, Chen L. Flavonoids from the stems of Millettia pachyloba Drake mediate cytotoxic activity through apoptosis and autophagy in cancer cells. J Adv Res 2019; 20:117-127. [PMID: 31338224 PMCID: PMC6626068 DOI: 10.1016/j.jare.2019.06.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Revised: 06/18/2019] [Accepted: 06/18/2019] [Indexed: 02/05/2023] Open
Abstract
In this study, systematic separation and subsequent pharmacological activity studies were carried out to identify cytotoxic natural products from the dried stems of Millettia pachyloba Drake. Five previously undescribed isoflavones, pachyvones A-E; one previously undescribed xanthone, pachythone A; and twenty-two known compounds were obtained. The structures of these compounds were assigned on the basis of 1D/2D NMR data and high-resolution electrospray ionization mass spectroscopy analysis. Preliminary activity screening with HeLa and MCF-7 cells showed that ten compounds (3-5, 9, 12, 17-19, 24, and 25) had potential cytotoxicity. Further in-depth activity studies with five cancer cell lines (HeLa, HepG2, MCF-7, Hct116, and MDA-MB-231) and one normal cell line (HUVEC) revealed that these ten compounds showed specific cytotoxicity in cancer cells, with IC50 values ranging from 5 to 40 μM, while they had no effect on normal cell lines. To investigate whether the cytotoxicity of these ten compounds was associated with autophagy, their autophagic effects were evaluated in GFP-LC3-HeLa cells. The results demonstrated that compound 9 (durmillone) significantly induced autophagy in a concentration-dependent manner and had the best activity as an autophagy inducer among all of the compounds. Therefore, compound 9 was selected for further study. The PI/Annexin V double staining assay and Western blotting results revealed that compound 9 also induced obvious apoptosis in HeLa and MCF-7 cells, which suggests that it mediates cytotoxic activity through activation of both apoptosis and autophagy. Taken together, this study identified ten natural cytotoxic products from the dried stems of Millettia pachyloba Drake, of which compound 9 induced apoptosis and autophagy and could be an anticancer drug candidate.
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Affiliation(s)
- Wei Yan
- Lab of Natural Product Drugs and Cancer Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Jianhong Yang
- Lab of Natural Product Drugs and Cancer Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Huan Tang
- Lab of Natural Product Drugs and Cancer Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Linlin Xue
- Lab of Natural Product Drugs and Cancer Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Kai Chen
- School of Chemical Engineering, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Lun Wang
- School of Chemical Engineering, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Min Zhao
- Lab of Natural Product Drugs and Cancer Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Minghai Tang
- Lab of Natural Product Drugs and Cancer Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Aihua Peng
- Lab of Natural Product Drugs and Cancer Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Chaofeng Long
- Guangdong Zhongsheng Pharmaceutical Co Ltd., Dongguan 440100, People’s Republic of China
| | - Xiaoxin Chen
- Guangdong Zhongsheng Pharmaceutical Co Ltd., Dongguan 440100, People’s Republic of China
| | - Haoyu Ye
- Lab of Natural Product Drugs and Cancer Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, People’s Republic of China
| | - Lijuan Chen
- Lab of Natural Product Drugs and Cancer Biotherapy, West China Hospital, West China Medical School, Sichuan University, Chengdu 610041, People’s Republic of China
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5
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Chavan LN, Mainkar PS, Chandrasekhar S. Organocatalytic Asymmetric Synthesis of Tetrahydrofuran and 1,2-Dihydrobenzofuran Scaffolds. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901067] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Lahu N. Chavan
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500007 Hyderabad India
- Academy of Scientific and Innovative Research (AcSIR); 201 002 Uttar Pradesh Ghaziabad India
| | - Prathama S. Mainkar
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500007 Hyderabad India
- Academy of Scientific and Innovative Research (AcSIR); 201 002 Uttar Pradesh Ghaziabad India
| | - S. Chandrasekhar
- Department of Organic Synthesis and Process Chemistry; CSIR-Indian Institute of Chemical Technology; 500007 Hyderabad India
- Academy of Scientific and Innovative Research (AcSIR); 201 002 Uttar Pradesh Ghaziabad India
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6
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Wen R, Lv HN, Jiang Y, Tu PF. Anti-inflammatory pterocarpanoids from the roots of Pongamia pinnata. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2019; 21:859-866. [PMID: 30678493 DOI: 10.1080/10286020.2018.1529759] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 09/24/2018] [Accepted: 09/24/2018] [Indexed: 06/09/2023]
Abstract
A phytochemical study on the roots of Pongamia pinnata afforded 11 pterocarpanoids, including three new compounds. The structures of the isolated compounds were determined by 1D and 2D NMR and HRESIMS data. The absolute configurations of the new compounds were assigned via analysis of the specific rotations and electronic circular dichroism (ECD) spectra. The isolates were evaluated for their inhibitory effects on nitric oxide (NO) production in LPS-stimulated BV-2 microglial cells. Six compounds exhibited inhibitory effects against NO production, and compound 5 showed the best activity with an IC50 value at 12.0 μM.
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Affiliation(s)
- Ran Wen
- a State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191 , China
- b School of Pharmacy, Hebei Medical University , Shijiazhuang 050017 , China
| | - Hai-Ning Lv
- a State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191 , China
| | - Yong Jiang
- a State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191 , China
| | - Peng-Fei Tu
- a State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University , Beijing 100191 , China
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7
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Oh Y, Lee J, Shin H, Sohn JH. Selective reductive cleavage of 2-(phenylthio)pyrimidines for efficient synthesis of 2-(H)pyrimidines. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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8
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Synthesis of 1,3-dioxo-substituted allenes via copper(I)-catalyzed coupling of α-oxo-alkynes and α-oxo-diazos by controlling the sequence of adding substrates. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Dubbu S, Vankar YD. Reaction of 1,2-Anhydrosugars with Arynes: An Approach to 1,2-Dihydrobenzofuran-Fused C
-Aryl Glycosides and C2-O
-Phenolic Glycals. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800705] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Sateesh Dubbu
- Department of chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur India
| | - Yashwant D. Vankar
- Department of chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur India
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10
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Pierrot D, Presset M, Rodriguez J, Bonne D, Coquerel Y. Normal, Abnormal, and Cascade Wittig Olefinations of α-Oxoketenes. Chemistry 2018; 24:11110-11118. [PMID: 29968938 DOI: 10.1002/chem.201801533] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/07/2018] [Indexed: 11/06/2022]
Abstract
α-Oxoketenes generated in situ by a thermal Wolff rearrangement have been found to participate as 1,2- and 1,4-ambident C-electrophilic/O-nucleophilic reagents towards donor/acceptor carbonyl-stabilized Wittig ylides. This resulted in the very direct and practical syntheses of functionalized allenes by a normal Wittig olefination, 4H-pyran-4-ones by an abnormal Wittig olefination, or 4H-pyranylidenes following a Wittig/abnormal Wittig cascade sequence as a function of the substrates combination employed. Mechanistic experimental and computational studies provided a full rational for these reactivity switches. Some unusual mechanistic features for Lewis acid-free Wittig olefinations were identified in this series such as the involvement of betaine intermediates and some degree of reversibility in the normal Wittig olefination. The abnormal Wittig olefination was fully uncovered.
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Affiliation(s)
- David Pierrot
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Marc Presset
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France.,Present address: Université Paris Est, ICMPE (UMR 7182), CNRS, UPEC, 2-8 rue Henri Dunant, 94320, Thiais, France
| | - Jean Rodriguez
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Damien Bonne
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
| | - Yoann Coquerel
- Aix Marseille Univ, CNRS, Centrale Marseille, iSm2, Marseille, France
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11
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Heravi MM, Kheilkordi Z, Zadsirjan V, Heydari M, Malmir M. Buchwald-Hartwig reaction: An overview. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.02.023] [Citation(s) in RCA: 118] [Impact Index Per Article: 19.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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12
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Liu W, Cao W, Hu H, Lin L, Feng X. Dynamic kinetic asymmetric transformations of β-halo-α-keto esters byN,N′-dioxide/Ni(ii)-catalyzed carbonyl-ene reaction. Chem Commun (Camb) 2018; 54:8901-8904. [DOI: 10.1039/c8cc04993a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
An effective dynamic kinetic asymmetric transformation of racemic β-halo-α-keto esters through carbonyl-ene reaction was realised.
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Affiliation(s)
- Wen Liu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education, College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Weidi Cao
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education, College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Haipeng Hu
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education, College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education, College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology
- Ministry of Education, College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
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13
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Ciesielski P, Metz P. A conceptually novel construction of the 6a-hydroxypterocarpan skeleton - Synthesis of (±)-variabilin. Bioorg Med Chem 2017; 25:6175-6177. [PMID: 28110821 DOI: 10.1016/j.bmc.2017.01.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 01/04/2017] [Indexed: 11/26/2022]
Abstract
A new access to the 6a-hydroxypterocarpan variabilin was established. Key step of this concise total synthesis is a challenging cyclization of a haloketone via halogen-metal exchange and subsequent intramolecular addition to the carbonyl function.
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Affiliation(s)
- Philipp Ciesielski
- Fachrichtung Chemie und Lebensmittelchemie, Organische Chemie I, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany
| | - Peter Metz
- Fachrichtung Chemie und Lebensmittelchemie, Organische Chemie I, Technische Universität Dresden, Bergstrasse 66, 01069 Dresden, Germany.
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14
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Abe T, Suzuki T, Anada M, Matsunaga S, Yamada K. 2-Hydroxyindoline-3-triethylammonium Bromide: A Reagent for Formal C3-Electrophilic Reactions of Indoles. Org Lett 2017; 19:4275-4278. [DOI: 10.1021/acs.orglett.7b01940] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Takumi Abe
- Faculty
of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Takuro Suzuki
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Sapporo 0600812, Japan
| | - Masahiro Anada
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Sapporo 0600812, Japan
| | - Shigeki Matsunaga
- Faculty
of Pharmaceutical Sciences, Hokkaido University, Sapporo 0600812, Japan
| | - Koji Yamada
- Faculty
of Pharmaceutical Sciences, Health Sciences University of Hokkaido, Ishikari-tobetsu, Hokkaido 0610293, Japan
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15
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Zavesky BP, Johnson JS. Direct Zinc(II)-Catalyzed Enantioconvergent Additions of Terminal Alkynes to α-Keto Esters. Angew Chem Int Ed Engl 2017; 56:8805-8808. [PMID: 28557339 PMCID: PMC5554871 DOI: 10.1002/anie.201704226] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 05/27/2017] [Indexed: 11/11/2022]
Abstract
The addition of terminal alkynes to racemic β-stereogenic α-keto esters was achieved in high levels of stereoselectivity, affording versatile tertiary propargylic alcohols containing two stereocenters. This environmentally benign enantioconvergent reaction proceeds with perfect atom economy, requires no solvent, and is catalyzed by a non-toxic zinc salt. The alkyne moiety can be leveraged in downstream transformations including hydrogenation to the corresponding saturated tertiary alcohol, which represents the product of a formal enantioconvergent aliphatic nucleophile addition.
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Affiliation(s)
- Blane P Zavesky
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
| | - Jeffrey S Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599-3290, USA
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16
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Zavesky BP, Johnson JS. Direct Zinc(II)-Catalyzed Enantioconvergent Additions of Terminal Alkynes to α-Keto Esters. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201704226] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Blane P. Zavesky
- Department of Chemistry; University of North Carolina at Chapel Hill; Chapel Hill NC 27599-3290 USA
| | - Jeffrey S. Johnson
- Department of Chemistry; University of North Carolina at Chapel Hill; Chapel Hill NC 27599-3290 USA
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17
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Lim KMH, Hayashi T. Dynamic Kinetic Resolution in Rhodium-Catalyzed Asymmetric Arylation of Phospholene Oxides. J Am Chem Soc 2017; 139:8122-8125. [DOI: 10.1021/jacs.7b04570] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Kelvin Meng-Hui Lim
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
- Department
of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore
- Institute
of Materials Research and Engineering, A*STAR, 2 Fusionopolis Way, Singapore 138634, Singapore
| | - Tamio Hayashi
- Division
of Chemistry and Biological Chemistry, School of Physical and Mathematical
Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore
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18
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Fang L, Liu S, Han L, Li H, Zhao F. Ruthenium-Catalyzed Synthesis of cis-2,3-Dihydrobenzofuran-3-ols by Aqueous Transfer Hydrogenation via Dynamic Kinetic Resolution. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00022] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Lizhen Fang
- School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, Henan, People’s Republic of China
| | - Saisai Liu
- School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, Henan, People’s Republic of China
| | - Lili Han
- School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, Henan, People’s Republic of China
| | - Huanhuan Li
- School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, Henan, People’s Republic of China
| | - Fangfei Zhao
- School of Pharmacy, Xinxiang Medical University, Xinxiang 453003, Henan, People’s Republic of China
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19
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Bartlett SL, Keiter KM, Johnson JS. Synthesis of Complex Tertiary Glycolates by Enantioconvergent Arylation of Stereochemically Labile α-Keto Esters. J Am Chem Soc 2017; 139:3911-3916. [PMID: 28252953 DOI: 10.1021/jacs.7b00943] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Enantioconvergent arylation reactions of boronic acids and racemic β-stereogenic α-keto esters have been developed. The reactions are catalyzed by a chiral (diene)Rh(I) complex and provide a wide array of β-stereogenic tertiary aryl glycolate derivatives with high levels of diastereo- and enantioselectivity. Racemization studies employing a series of sterically differentiated tertiary amines suggest that the steric nature of the amine base additive exerts a significant influence on the rate of substrate racemization.
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Affiliation(s)
- Samuel L Bartlett
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Kimberly M Keiter
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
| | - Jeffrey S Johnson
- Department of Chemistry, University of North Carolina at Chapel Hill , Chapel Hill, North Carolina 27599-3290, United States
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20
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Feng J, Yuan X, Luo W, Lin L, Liu X, Feng X. ChiralN,N′-Dioxide-Organocatalyzed Regio-, Diastereo- and Enantioselective Michael Addition-Alkylation Reaction. Chemistry 2016; 22:15650-15653. [DOI: 10.1002/chem.201603629] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Indexed: 01/04/2023]
Affiliation(s)
- Juhua Feng
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 P. R. China
- College of Science; Sichuan Agricultural University, Ya'an; Sichuan 625014 P. R. China
| | - Xiao Yuan
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 P. R. China
| | - Weiwei Luo
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 P. R. China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 P. R. China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 P. R. China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 P. R. China
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21
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Barrios Antúnez DJ, Greenhalgh MD, Fallan C, Slawin AMZ, Smith AD. Enantioselective synthesis of 2,3-disubstituted trans-2,3-dihydrobenzofurans using a Brønsted base/thiourea bifunctional catalyst. Org Biomol Chem 2016; 14:7268-74. [DOI: 10.1039/c6ob01326k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The enantioselective synthesis of 2,3-disubstituted trans-2,3-dihydrobenzofuran derivatives via intramolecular Michael addition has been developed using a bifunctional tertiary amine–thiourea catalyst.
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Affiliation(s)
| | | | - Charlene Fallan
- EaStCHEM
- School of Chemistry
- University of St Andrews
- St Andrews
- UK
| | | | - Andrew D. Smith
- EaStCHEM
- School of Chemistry
- University of St Andrews
- St Andrews
- UK
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22
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Mane V, Pandey J, Ayyagari N, Dey C, Kale R, Namboothiri INN. Synthesis of hydrazinoheterocycles from Morita–Baylis–Hillman adducts of nitroalkenes with azodicarboxylates. Org Biomol Chem 2016; 14:2427-38. [DOI: 10.1039/c5ob02656c] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Hydrazinonitroalkenes derived from nitroalkenes and azodicarboxylates are excellent substrates for the synthesis of hitherto unreported hydrazinotriazoles and hydrazinodihydrofurans.
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Affiliation(s)
- Vaijinath Mane
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Jyoti Pandey
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Narasihmam Ayyagari
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Chandan Dey
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
| | - Raju Kale
- Department of Chemistry
- Indian Institute of Technology Bombay
- Mumbai 400076
- India
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23
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Feng J, Lin L, Yu K, Liu X, Feng X. Asymmetric Synthesis of Dihydrofurans via Organocatalytic Domino Michael-Alkylation Reaction. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401198] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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24
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Calter MA, Korotkov A. Catalytic, Asymmetric, Aldol/O-Conjugate Addition Sequence for the Construction of Highly Substituted Furanoids. Org Lett 2015; 17:1385-8. [DOI: 10.1021/acs.orglett.5b00154] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Michael A. Calter
- Department of Chemistry, Wesleyan University, Middletown, Connecticut 06459, United States
| | - Alexander Korotkov
- Department of Chemistry, Wesleyan University, Middletown, Connecticut 06459, United States
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25
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Eftekhari-Sis B, Zirak M. Chemistry of α-oxoesters: a powerful tool for the synthesis of heterocycles. Chem Rev 2014; 115:151-264. [PMID: 25423283 DOI: 10.1021/cr5004216] [Citation(s) in RCA: 95] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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26
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Belmessieri D, de la Houpliere A, Calder EDD, Taylor JE, Smith AD. Stereodivergent organocatalytic intramolecular Michael addition/lactonization for the asymmetric synthesis of substituted dihydrobenzofurans and tetrahydrofurans. Chemistry 2014; 20:9762-9. [PMID: 24989672 PMCID: PMC4517160 DOI: 10.1002/chem.201402684] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Indexed: 11/19/2022]
Abstract
A stereodivergent asymmetric Lewis base catalyzed Michael addition/lactonization of enone acids into substituted dihydrobenzofuran and tetrahydrofuran derivatives is reported. Commercially available (S)-(-)-tetramisole hydrochloride gives products with high syn diastereoselectivity in excellent enantioselectivity (up to 99:1 d.r.syn/anti , 99 % eesyn ), whereas using a cinchona alkaloid derived catalyst gives the corresponding anti-diastereoisomers as the major product (up to 10:90 d.r.syn/anti , 99 % eeanti ).
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Affiliation(s)
- Dorine Belmessieri
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Alix de la Houpliere
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Ewen D D Calder
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - James E Taylor
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St. AndrewsNorth Haugh, St. Andrews, KY16 9ST (UK) E-mail:
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27
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Jiang S, Hu B, Yu X, Deng W. Fc-PIP Catalyzed Asymmetric Synthesis ofcis-2,3-Dihydrobenzofurans. CHINESE J CHEM 2014. [DOI: 10.1002/cjoc.201400186] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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28
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Corbett MT, Johnson JS. Dynamic kinetic asymmetric transformations of β-stereogenic α-ketoesters by direct aldolization. Angew Chem Int Ed Engl 2013; 53:255-9. [PMID: 24222195 DOI: 10.1002/anie.201306873] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Indexed: 11/11/2022]
Abstract
Dynamic kinetic asymmetric transformations (DyKAT) of racemic β-bromo-α-keto esters by direct aldolization of nitromethane and acetone provide access to fully substituted α-glycolic acid derivatives bearing a β-stereocenter. The aldol adducts are obtained in excellent yield with high relative and absolute stereocontrol under mild reaction conditions. Mechanistic studies determined that the reactions proceed through a facile catalyst-mediated racemization of the β-bromo-α-keto esters under a DyKAT Type I manifold.
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Affiliation(s)
- Michael T Corbett
- Department of Chemistry, The University of North Carolina at Chapel Hill, Chapel Hill, NC 27599 (USA) http://www.unc.edu/jsjgroup/Home.html
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29
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Corbett MT, Johnson JS. Dynamic Kinetic Asymmetric Transformations of β-Stereogenic α-Ketoesters by Direct Aldolization. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306873] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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30
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Malik N, Erhardt P. Synthesis of 6a-hydroxypterocarpans via intramolecular benzoin condensation. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.05.121] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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31
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Liu Y, Lu A, Hu K, Wang Y, Song H, Zhou Z, Tang C. Bifunctional Primary Amine-Squaramide Catalyzed Enantioselective Intramolecular Michael Addition of Keto-enones: A Convenient Process to the Stereocontrolled Construction oftrans-Dihydrobenzofuran Skeletons. European J Org Chem 2013. [DOI: 10.1002/ejoc.201300331] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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32
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Formal [4+1] cycloaddition of camphor-derived sulfonium salts with aldimines: enantioselective synthesis of 2,3-dihydrobenzofurans. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.03.059] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Jarava-Barrera C, Esteban F, Navarro-Ranninger C, Parra A, Alemán J. Asymmetric synthesis of trans-dihydroarylfurans in a Friedel–Crafts/substitution domino reaction under squaramide catalysis. Chem Commun (Camb) 2013; 49:2001-3. [DOI: 10.1039/c2cc38534a] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Goel A, Kumar A, Raghuvanshi A. Synthesis, stereochemistry, structural classification, and chemical reactivity of natural pterocarpans. Chem Rev 2012; 113:1614-40. [PMID: 23214501 DOI: 10.1021/cr300219y] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Atul Goel
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, Lucknow, India.
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35
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Kumar CHV, Kavitake S, Kumar SS, Cornwall P, Ashok M, Bhagat S, Manjunatha SG, Nambiar S. Development of an Efficient, Scalable Route for the Preparation of a Novel Insulin-Like Growth Factor-1 Receptor Modulator. Org Process Res Dev 2012. [DOI: 10.1021/op300120r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- CH Vinod Kumar
- Pharmaceutical Development, AstraZeneca India Pvt. Ltd., Bellary Road, Hebbal, Bangalore 560 024, India
| | - Santosh Kavitake
- Pharmaceutical Development, AstraZeneca India Pvt. Ltd., Bellary Road, Hebbal, Bangalore 560 024, India
| | - Sythana Suresh Kumar
- Pharmaceutical Development, AstraZeneca India Pvt. Ltd., Bellary Road, Hebbal, Bangalore 560 024, India
| | - Philip Cornwall
- Medicines Evaluation Chemistry, Pharmaceutical
Development, AstraZeneca, Charter Way,
Macclesfield SK10 2NA, U.K
| | - Mithun Ashok
- Pharmaceutical Development, AstraZeneca India Pvt. Ltd., Bellary Road, Hebbal, Bangalore 560 024, India
| | - Sagar Bhagat
- Pharmaceutical Development, AstraZeneca India Pvt. Ltd., Bellary Road, Hebbal, Bangalore 560 024, India
| | - Sulur G. Manjunatha
- Pharmaceutical Development, AstraZeneca India Pvt. Ltd., Bellary Road, Hebbal, Bangalore 560 024, India
| | - Sudhir Nambiar
- Pharmaceutical Development, AstraZeneca India Pvt. Ltd., Bellary Road, Hebbal, Bangalore 560 024, India
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36
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Lu A, Hu K, Wang Y, Song H, Zhou Z, Fang J, Tang C. Enantioselective Synthesis of trans-Dihydrobenzofurans via Primary Amine-Thiourea Organocatalyzed Intramolecular Michael Addition. J Org Chem 2012; 77:6208-14. [DOI: 10.1021/jo301006e] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Aidang Lu
- State Key Laboratory of Elemento-Organic Chemistry,
Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Keling Hu
- State Key Laboratory of Elemento-Organic Chemistry,
Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Youming Wang
- State Key Laboratory of Elemento-Organic Chemistry,
Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Haibin Song
- State Key Laboratory of Elemento-Organic Chemistry,
Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Zhenghong Zhou
- State Key Laboratory of Elemento-Organic Chemistry,
Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Jianxin Fang
- State Key Laboratory of Elemento-Organic Chemistry,
Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
| | - Chuchi Tang
- State Key Laboratory of Elemento-Organic Chemistry,
Institute of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, P. R. China
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